I checked the * alliance RTW rule and I don't find any backtracking issue inside a continent.

So I change the routing for this summer vacation.

Does it mean we can backtrack in europe and in Asia such as:

HNL-SFO-FRA-(surface)-TXL-VCE-(surface)-FLR -(FRA as transit)-CDG-NRT-BKK-(NRT as Transit)-HNL ?

We plan to use Rent a car between FRA-TXL and Venice-Florence.

Are these allowed?
or are these considered double open jaws in Europe which is not permited?

Thanks again in advance.